docs(07.3): create phase plan — ES256 algorithm upgrade

3 plans (3 waves): Wave 0 xfail stubs, Wave 1 ES256 core + startup
rotation, Wave 2 remember-me TTL split + LoginView checkbox.
Verification passed (0 blockers, 1 minor doc warning fixed).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/STATE.md

@@ -2,13 +2,13 @@
 gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: Redo and Optimize LLM Integration
-current_phase: 7.1 (complete)
-status: completed
-last_updated: "2026-06-05T12:42:08.692Z"
+current_phase: 07.2
+status: executing
+last_updated: "2026-06-05T16:59:58.593Z"
 progress:
   total_phases: 7
   completed_phases: 4
-  total_plans: 14
+  total_plans: 19
   completed_plans: 14
   percent: 57
 ---
@@ -16,8 +16,8 @@ progress:
 # Project State
 
 **Project:** DocuVault
-**Status:** v1.0 Milestone COMPLETE — All 7 phases done
-**Current Phase:** 7.1 (complete)
+**Status:** Executing Phase 07.2
+**Current Phase:** 07.2
 **Last Updated:** 2026-06-05
 
 ## Phase Status
@@ -35,10 +35,12 @@ progress:
 | 7 | Redo and Optimize LLM Integration | ✓ Complete (5/5 plans, UAT 11/11 passed, security gate passed) |
 | 7.1 | Security: session revocation on privilege change (CR-01..03) | ✓ Complete (2/2 plans, 3 new tests, frontend toasts) |
 | 7.2 | Security: JTI claim + Redis access-token revocation | ◆ Planned (3 plans, 3 waves) — ready to execute |
+| 7.3 | Security: ES256 algorithm upgrade | ◆ Planned (3 plans, 3 waves) — ready to execute |
 
 ## Current Position
 
-Phase: 7 (redo-and-optimize-llm-integration) — COMPLETE
+Phase: 07.2 (security-jti-claim-redis-access-token-revocation-inserted) — EXECUTING
+Plan: 1 of 3
 Phase: 7.1 (security-session-revocation-on-privilege-change) — COMPLETE (2/2 plans)
 **Progress:** [██████████] 100% (v1.0 base complete; Phase 7.1 inserted as urgent follow-up)